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EnumGen.cs

// GtkSharp.Generation.EnumGen.cs - The Enumeration Generatable.
//
// Author: Mike Kestner <mkestner@speakeasy.net>
//
// Copyright (c) 2001 Mike Kestner
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the GNU General Public
// License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.


namespace GtkSharp.Generation {

      using System;
      using System.Collections;
      using System.IO;
      using System.Xml;

      public class EnumGen : GenBase {
            
            string enum_type = String.Empty;
            ArrayList members = new ArrayList ();

            public EnumGen (XmlElement ns, XmlElement elem) : base (ns, elem) 
            {
                  foreach (XmlElement member in elem.ChildNodes) {
                        if (member.Name != "member")
                              continue;

                        string result = "\t\t" + member.GetAttribute("name");
                        if (member.HasAttribute("value")) {
                              string value = member.GetAttribute("value");
                              if (value.EndsWith("U")) {
                                    enum_type = " : uint";
                                    value = value.TrimEnd('U');
                              }
                              result += " = " + value;
                        }
                        members.Add (result + ",");
                  }
            }

            public override bool Validate ()
            {
                  return true;
            }

            public override string DefaultValue {
                  get {
                        return "(" + QualifiedName + ") 0";
                  }
            }

            public override string MarshalType {
                  get {
                        return "int";
                  }
            }

            public override string CallByName (string var_name)
            {
                  return "(int) " + var_name;
            }
            
            public override string FromNative(string var)
            {
                  return "(" + QualifiedName + ") " + var;
            }
            
            public override void Generate (GenerationInfo gen_info)
            {
                  StreamWriter sw = gen_info.OpenStream (Name);

                  sw.WriteLine ("namespace " + NS + " {");
                  sw.WriteLine ();
                  sw.WriteLine ("\tusing System;");
                  sw.WriteLine ("\tusing System.Runtime.InteropServices;");
                  sw.WriteLine ();

                  sw.WriteLine ("#region Autogenerated code");
                              
                  if (Elem.GetAttribute("type") == "flags")
                        sw.WriteLine ("\t[Flags]");
                  if (Elem.HasAttribute("gtype"))
                        sw.WriteLine ("\t[GLib.GType (typeof (" + NS + "." + Name + "GType))]");

                  string access = IsInternal ? "internal" : "public";
                  sw.WriteLine ("\t" + access + " enum " + Name + enum_type + " {");
                  sw.WriteLine ();
                        
                  foreach (string member in members)
                        sw.WriteLine (member);

                  sw.WriteLine ("\t}");

                  if (Elem.HasAttribute ("gtype")) {
                        sw.WriteLine ();
                        sw.WriteLine ("\tinternal class " + Name + "GType {");
                        sw.WriteLine ("\t\t[DllImport (\"" + LibraryName + "\")]");
                        sw.WriteLine ("\t\tstatic extern IntPtr " + Elem.GetAttribute ("gtype") + " ();");
                        sw.WriteLine ();
                        sw.WriteLine ("\t\tpublic static GLib.GType GType {");
                        sw.WriteLine ("\t\t\tget {");
                        sw.WriteLine ("\t\t\t\treturn new GLib.GType (" + Elem.GetAttribute ("gtype") + " ());");
                        sw.WriteLine ("\t\t\t}");
                        sw.WriteLine ("\t\t}");
                        sw.WriteLine ("\t}");
                  }

                  sw.WriteLine ("#endregion");
                  sw.WriteLine ("}");
                  sw.Close ();
                  Statistics.EnumCount++;
            }
      }
}


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